Improvement in harrows



Unirse STA'rns PATENT yertoe JOHN WOOLRIDGE, OF DEANS GORNERS, ILLINOIS.

IMPROVEMENT IN HARROWS.

Specification forming part of Letters Patent No. 184,489, dated November 21, 1876 application filed July 20, v1874.

o all whom it may concern:

Be it known that I, JOHN WooLRIDeE, of Deans Corners, in the county ot' Lake and 'State of Illinois, have invented new and useful Improvements in Barrows, of which the following is a full description, reference being had to the accompanying' drawings, in which- Figure l is a plan view; Fig. 2, a side view, with the bar a removed; Figs. 3 and 4, enlarged details.

It is desirable that the teeth of harrows be set at dierent angles, depending upon lthe nature of the soil and the work to -be done. The chief objects of my invention are to so construct a barrow that the teeth can be readily adjusted at any desired angle, and to provide for the free movement of two single harrows constructed as described. l

In the drawings, A B represent two single harrows, each consisting ot' a longitudinal bar, to which the cross-bars which carry the teeth are loosely connected. As represented, the longitudinal har is composed of tWo parts, a a', placed a little distance apart, with blocks between them at the ends. b are cross-bars, which carry the teeth e. They are round, and tit loosely in a circular recess, c, on the under side ofthe longitudinal bars' a a', and are held in place by means of the bearings d secured to the longitudinal bars, so as to permit the free movement of the bars b. is a strong pin or post firmly secured to each of the cross-bars b. A collar, u, Fig. 4, may be secured to the cross-bars b between the two parts a a', to preventlateral movement. fis a longitudinal bar, to which the pins or postsz' arepivoted. g is a lever, the lower end of which is pivoted to the longitudinal bars a a', to which the outer end of f is pivoted. H is a spring-bar, provided with notches to hold the leverg in position. '/c l are tWoycross-bars, the ends of which are provided with sockets m, which slip over pins or rods n, which are secured to the longitudinal bars a. r is a draw-bar.

As shown in Fig. 2, the teeth e stand at right angles With the longitudinal bar; but,

by means of the lever g, bar f, and pins t', the position of the teeth can be changed to any required angle, as indicated by the dotted- It is not essential to make the longitudinal I bar ot' two parts, as shown, because the devices for changing the position of the teeth may be placed outside ofthe bar, if desired but the construction described is preferred,

'among other reasons, because a better bearing is furnished with the same amount of material for the bars b.

It isl evident that a single harrow may be constructed substantially upon the plan described.

The bars b might be connected with the longitudinal bars Without providing them With the recesses c, suitable boxes being used.

This harrovv may be constructed Without the adjusting devices, in which case the crossbars b may be permanently attached to the longitudinal bar. This construction will be found very cheap, and the barrow very efficient, its open form being Well adapted to prevent clogging.

What I claiin as new is as follows The sections A B, each having longitudinal central bars a a', pivoted cross-bars b, with teeth c, .in combination with the pivoted con necting-bars k l, and devices for changing the angle ot' the teeth, as and for the purpose described. 4

JOHN `WOOLRIDGE. Witnesses E. A. WEST, O. W. BOND. 

